首页|基于黏性蒸馏-气相分离的冶金级粗碲提纯方法

基于黏性蒸馏-气相分离的冶金级粗碲提纯方法

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开发一种基于黏性蒸馏-气相分离的高纯碲材料制备方法.通过调节冷凝器结构和冷凝温度,达到黏性蒸馏、控制碲优势冷凝区的目的,使挥发性差的物质留在残留物中,而硒在气相中与碲分离,实现冶金级粗碲的提纯.研究饱和蒸气压、碲分子平均自由程、不同冷凝位置的杂质分布特征以及冷凝物形貌.500 g级的实验结果表明,在5 Pa、773 K和90 min的最佳实验条件下,碲的直收率为83.40％,纯度高于99.9996％,碲优势冷凝区冷凝物中硒含量降低至2.76×10-4％(质量分数).
Purification of metallurgical-grade crude tellurium based on viscous distillation and gas-phase separation
A method for preparing high-purity tellurium based on viscous distillation and gas-phase separation was developed.By adjusting the condenser structure and condensing temperature to achieve viscous distillation,the dominant condensation zone for tellurium was controlled;hence,poorly volatile substances remained in the crucible,while selenium was separated from tellurium in the gas phase to achieve the purification of metallurgical-grade crude tellurium.Specifically,the saturated vapor pressure,mean free path of tellurium,impurity distribution,and morphologies of the condensate at different locations were investigated in detail.The results for a 500 g upscaled experiment showed that the direct yield of Te was 83.40％,the purity of Te reached higher than 99.9996 wt.％and the selenium content in the dominant condensation zone was reduced to 2.76×10-4 wt.％under the optimal experimental conditions of 5 Pa,773 K and 90 min.

high-purity telluriumselenium removalrefinementmean free pathdominant condensation zone

黄大鑫、蒋文龙、徐宝强、查国正、杨斌

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昆明理工大学真空冶金国家工程研究中心,昆明 650093

昆明理工大学省部共建复杂有色金属资源清洁利用国家重点实验室,昆明 650093

昆明理工大学冶金与能源工程学院,昆明 650093

高纯碲 除硒 提纯 平均自由程 优势冷凝区

国家重点研发计划国家自然科学基金Construction of High-level Talents of Kunming University of Science and Technology,ChinaLeading Talents of Industrial Technology in Ten Thousand Talents Plan of Yunnan Province,ChinaScientist Studio of Yunnan Province,China

2022YFC2904900U190222120210172

2024

10.1016/S1003-6326(23)66452-0

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(3)
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